Tool for punching metal roofing



April 15, 1947. E, |=V AYNE 2,418,984

TOOL FOR PUNCHING METAL ROOFING Filed Nov. 5, 1945 Patented Apr.15,*1947 .2 :,ff'

STATE-s OFFICE 2,418,984 l PUNCHING METALJRQEING Ernest-.Payneen-tfer,Colo. y l I Application, 'venier 5, 1945.serialne.,1.526,8.23L` l 3claims'- -(c1. 16a- 119)v t This invention relates to a ltool forpunching holes in sheet metal roongfor receivingxthe roofing nails forattaching Vsairnet'o the supporting sheathing or lathing.

' Sheet metal roofing is usually formed in two styles known ascorrugated and V-crimp roong. The corrugated roofing is rolled to forman-alternating series of ridges and troughs roundf ing into each other.The V-crimp roofing has a, plurality of relatively sharp ridges runninglengthwise of the strip, usually one ridge atcach edge and one on themiddle line thereof.V The edge ridges vof adjacent strips areoverlapped. The strips are nailed to the sheathing or lathing by meansof roofing nails which must'be placed along the apex of the ridges toprevent water from ventering around the nails. ",It is exceedinglydifficult to drive the v nails through the heavier gauges of sheet andit is "also difficult to accurately position the nails on the apex ofthe ridges vwhen being driven since they slip therefrom before piercingthe metaly The principal object of this invention is to provide apunching tool which will easily pierce the heaviest sheet and which canbe readily used for placingthe nail holesualong--the apex ridges of theroofing so that the nails may be properly positioned therealong.` j

Another object of the invention is to provide apunch of this characterin which the punch member may be quickly and easily removed forreplacement or resharpening purposes.

Other objects and advantages reside in the detail construction of theinvention, which is designed vfor simplicity, economy and efficiency.These will become more apparent from the following description.

In the following detailed description of the invention, reference is hadto the accompanying drawing which forms a part hereof. Like numeralsrefer to like parts in all views of the drawing and throughout thedescription.

In the drawing:

Fig. 1 is a side elevation of the improved tool as it would appear whenbeing used on a V- crimp roofing;

Fig. 2 is a similar view illustrating its use on corrugated roong;

Fig. 3 is van enlarged, longitudinal section through the head of thetool;

Fig. 4 is a cross section therethrough looking down on the line 4 4,Fig. 3;

Fig. 5 is a magnified view of the point of a punch employed in theimproved tool;

Fi g 6 4is a cross section'fthe point of the punch,'taken on the-lineG-B Fig.5;

Fig. 1 'is a bottom view of the'improved tool;- and Figg is a verticalform of the tool. In Figs. 1 and 2, roof sheathing for lathing isillustrated at 25 for supportingsheet metal roofing. In Fig. 1, typica1V-crimp" Vmetal 'rooting is indicated at 21 with-itsoverlapping'V-ridges at 28. InFig. 2, typical corrugated metal rooiingis indicated'atZS.

The preferred form section through'an alternate ofthe improved tool-em#ploys a vdownwardly f acingj annular, threaded socket II. A cup membervI2u is threaded upwardly into the socket II, and a 'cap I3iis4 'pro-4jected upwardly through the top thereof.

VThe upper portion of the socket Il" is flanged inwardly, na s shown vatI4, so that it will yprojectirito the interior of the cupjI 2. The capI3 is provided with a peripheral flange I5'around its bottom which,contacts the harige I4 toprevent withdrawal of the cap I3. y The;bcttomor thecup vI2 is formed withl a diametr'ically extending-concavity ,IBwhich fits over the apexesof the ridges of the roofing and contacts the`sides of said ridges. A punQh guide' hole I1 is formed at thecenter ofthe concavity for guiding avpunch member. Ihe punch member consists of apunch I8 vterminating at its top in a hat head I9 which nts snuglywithinfthe c ap I3. The lower extremity of the punch I8 issharpenedto apiercingpoint 2li. pluralityoflaterally extending metal cutting ridgesZIsurround the point 2l).v l The head I9 is constantly urged upwardly intothe cap I3 to support the latter by means of a compression spring 22.The lower extremity of the spring 22 fits into a cup washer 23 restingon the bottom of the cup I2, and surrounding the opening I1. A ring band24 is positioned within the cup I2 to be contacted by the cap I3 tolimit the downward movement thereof.

In use, the concavity I6 of the cup I2 is placed over a ridge of thecorrugated roong 29, as shown in Fig. 2, or 'over the V-ridges 28 of theroong 21, as shown in Fig. l. The cap I3 is then struck with a hammerwith sumcient force to drive the point 20 of the punch I8 through theroofing so as to form a nail hole therein. The cutting ridges 2l on thepoint 20 split the sides of the nail hole as the punch member enterstherein so that the sides thereof will roll uniformly outward.

Only the tapered point 2U of the punch I8 enters the roofing sincedownward movement is limited by the ange I5 of the cap engaging the stopring 24. This prevents the punch from becoming stuck in the hole andallows it to be easily withdrawn by the natural eXpansion of the spring22. The stop ring 24 also prevents the cap I3 from being drivensuiiciently far downward to allow the socket II to be damaged by thehammer. It can be readily seen that the punch may be removed andreplaced in the toolby'simpf unscrewin'g'the culmembier I2.

The socket I I is provided with a pair of peripheral flanges 26 whichprovide convenient ni ger grips for lifting the punch. 'L'hese .anges valso provide means for retaining a handle I0' in place, it a handle isdesired.

The handle I0 is preferably formedirom. a. metal strap having anydesiredshape. Th'estrap is wrapped about the socket II, between theflanges 26 and is clamped thereabout by means of a suitable-clamp-screw3I-..

In Fig. 8, an alternateformoff the toolisillus-A tratedf which. employsthe same; handle IIJ'. and socket Il as the previously described form.In. this-case, however, a splity pinl andspring; socket member 30 isplaced within a cap 3l innthesocket. II.' The two halves ofy the member3U enclose a headed punchpin 32 whichU canl be projected through a guideopening 33 in a. concave .bottom- 34-lin1a cup member 35.Acompressionspring.3'.6 acts to forcethe member; 3l)y upwardlyand it isdriven downwardly by a blow of. the hammer on4 the .cap 3 I .as in. rthepreceding` form., l. v2in this form,I the bottom of they member 33strikes thev bottom 3`4- to limitdownward move.- ment of thecap 3 I. v

The operation. .an-d use*v of. the alternate formare. similar to that ofthe previously described form.,

While va specific form/ofi the improvement has been describedv andillustrated herein,` it.l is; desired tobeunderstood that theV same maybe varied. within the scope of the appended claims, without departing,from thespiritl ot the invention.

Having. thusv described the invention,- whatis. claimedand desiredsecured. by Letters Patent is I. A tool for punching holes in the:ridgesof sheet metal roong. comprising: a,- kcup memher;

a cencavi'ty inthe bottom. of saidlmemberextend.- ing. diametri'call'ythereof for receiving the. roong ridges;` a punch member within said cupmember extending thro-ugh a. guide openingr in. thev bottom thereof'l atthe apex of. said .concavi'tm spring means" for supporting. said punchmember, said punch member being. adapted to be. driven-dowm wardly bythe blow from a striking tool; and a plurality of laterally extendingmetal cutting ridges positioned around the point of said punch memberfor splitting the edge of the opening formed thereby.

2. A tool for punching holes in the ridges of sheet metal roofingcomprising; a handle; an annular,'downwardly-facing, threaded socketcarried at one extremity of said handle; an inverted, cup-shaped capmember extending through a croncentriewopening in the top' of said'socket; a peripheral flan'geabouttheopen face of said cap memberpreventing its complete passage through said opening; a cup memberthreaded into said socket and closing; the bottom thereof; an upwardlyindented, ridge-receiving groove extending diamet'rically across thebottom of said cup member and provided with a punch opening at itsapex;V a punch `within said cup member extendingvinto said opening; andresilient means supporting and maintaining said punch in contaetfwithJsaid capi V3. A.4 tool for punching.. holes. in. the. ridges of sheet.metalrooiing. comprisingez. ahandle anl annular, downwardly-facing,threaded socket carried at oney extremity of said handle an inverted,cup-shaped cap member extending through a concentric opening in. the.top of saidsocket; a peripheral. iiange. about the. open. face, ofv saidcap member preventing, its complete passage through said opening.; a.cup. member threaded into, said. socket. and` closing the, bottomYthereof; an: upwardly indented',T ridge-receiving groove .extendingvdiametricall's across. the bottom oi said cup member and provided with.a punch opening. at.` its apex; a-punch within said cup member exstending vinto said' opening.;` .resilient means, supporting and. said.punch in contact withsaid cap; and an. annular stop member .in said. cupAin the descending path off said capv tol the downward movement of the,latter.

. ERNEST PAYNE.

REFERENCES GITEDv The hrllowing references areI of record in the fue ofthis patents,

STATES; PATENTS Number Name Date 640,696 Pearl Jan. 2, 1900 1,482,813Bewsick. Apr.. 8, 1924 2,349.`,.5I:"7 Townsend May 23,. 1944 FOREIGNPATENTS Number Country Date 621,101 French ---nf-uf- Jan. 29, 1927

